16 ENTOZOA. 



man and monkeys ; they are still less frequent in the higher car- 

 nivora ; none, to my knowledge, having been detected either in the 

 lion or tiger. In the common cat two forms are known, one proper 

 to the wild, and the other proper to the domesticated state. Only 

 a few infest the dog and fox, and they are almost entirely absent in 

 the civets and ichneumons, an exception occurring in the Indian 

 Yiverra. Flukes are abundant in the bats, being scarcely less pre- 

 valent in the moles and shrews, whilst three forms are known to 

 infest the hedgehog. None have been described from the bears 

 proper, but a species has been found in the closely allied badger. 

 Weasels are particularly Hable to invasion, and the same may be 

 said of the amphibious seals. Eodents are tolerably free; but the 



Fia. 2. — DiSTOMA OOMP ACTUM, Colloid. — From the lung of an Indian Ichneumon {Viverra 

 mimgos, L.) X 5 diam. — Original. 



Fasciola hepatica is said to have been found in the common squirrel. 

 Rats and mice generally escape invasion, and none have been 

 detected in the sloths ; hares and rabbits, on the other hand, 

 harbour these parasites. Flukes abound in swine, but seldom gain 

 access to the horse or ass. Speaking generally, they are prevalent 

 in all ruminating herbivores, being grievously numerous in sheep 

 and cattle. 



In Birds. — On the whole it may be said that the Trematoda are 

 scarcely less abundant in birds than in mammals. Hitherto, so far 

 as I am aware, they have not been met with in pigeons, parrots, 

 or even in the insectivorous woodpeckers ; but, as might be 



